rbd: drop oid parameters from ceph_osdc_build_request()

The last two parameters to ceph_osd_build_request() describe the
object id, but the values passed always come from the osd request
structure whose address is also provided.  Get rid of those last
two parameters.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>

drivers/block/rbd.c

@@ -1176,11 +1176,7 @@ static int rbd_do_request(struct request *rq,
 				snapid, ofs, &len, &bno, osd_req, ops);
 	rbd_assert(ret == 0);
 
-	ceph_osdc_build_request(osd_req, ofs, &len,
-				ops,
-				snapc,
-				&mtime,
-				osd_req->r_oid, osd_req->r_oid_len);
+	ceph_osdc_build_request(osd_req, ofs, &len, ops, snapc, &mtime);
 
 	if (linger_req) {
 		ceph_osdc_set_request_linger(osdc, osd_req);

include/linux/ceph/osd_client.h

@@ -227,9 +227,7 @@ extern void ceph_osdc_build_request(struct ceph_osd_request *req,
 				    u64 off, u64 *plen,
 				    struct ceph_osd_req_op *src_ops,
 				    struct ceph_snap_context *snapc,
-				    struct timespec *mtime,
-				    const char *oid,
-				    int oid_len);
+				    struct timespec *mtime);
 
 extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
 				      struct ceph_file_layout *layout,

net/ceph/osd_client.c

@@ -376,9 +376,7 @@ void ceph_osdc_build_request(struct ceph_osd_request *req,
 			     u64 off, u64 *plen,
 			     struct ceph_osd_req_op *src_ops,
 			     struct ceph_snap_context *snapc,
-			     struct timespec *mtime,
-			     const char *oid,
-			     int oid_len)
+			     struct timespec *mtime)
 {
 	struct ceph_msg *msg = req->r_request;
 	struct ceph_osd_request_head *head;
@@ -405,9 +403,9 @@ void ceph_osdc_build_request(struct ceph_osd_request *req,
 
 
 	/* fill in oid */
-	head->object_len = cpu_to_le32(oid_len);
-	memcpy(p, oid, oid_len);
-	p += oid_len;
+	head->object_len = cpu_to_le32(req->r_oid_len);
+	memcpy(p, req->r_oid, req->r_oid_len);
+	p += req->r_oid_len;
 
 	src_op = src_ops;
 	while (src_op->op) {
@@ -506,8 +504,7 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
 
 	ceph_osdc_build_request(req, off, plen, ops,
 				snapc,
-				mtime,
-				req->r_oid, req->r_oid_len);
+				mtime);
 
 	return req;
 }